车联网中基于休眠机制部署RSUs方案

A sleep scheduling-based placement of RSUs in VANETs

针对车联网(vehicular ad hoc networks,VANETs)中路边设施单元(road side units,RSUs)部署问题,提出部署RSU的新方案,记为P_RSU方案。P_RSU方案以保证必要的数据包传输率(packet delivery ratio,PDR)为前提,以降低所有RSUs消耗总能量为目的。P_RSU方案引用休眠机制,并采用太阳能作为RSUs能量供给的补充。首先将P_RSU方案进行形式化表述,形成约束条件、多目标函数。然后,通过RPR(rainbow product ranking)算法求解目标函数,从而获取部署RSUs的最优位置。仿真结果表明,提出的P_RSU方案能有效地降低能量消耗、优化RSUs数量。

For the problem of deploying road side units (RSUs) in (vehicular ad hoc networks, VANETs). A new scheme for RSUs placing is proposed, named as P RSU scheme. The necessary (packet delivery ratio, PDR) is prerequisite, and P_RSU scheme is proposed to reduce the total energy consumption of placing RSUs. The sleep mechanism is applied, and the solar in in- troduced as energy supplement of RSUs. In P_RSU scheme, firstly the formal expression is expressed as the constraint condition and multi-objective function. Secondly, objective function is solved by RPR (rainbow product ranking) algorithm, and the opti- mal location of placing RSUs is obtained. Simulation results show that the proposed P_RSU seheme is good performance in terms of reducing energy consumption.